Price comparison between Samsung 77-inch QA77S90C and LG 77-inch 77C2PSA TVs
Samsung QA77S90C OLED 4K 77-inch Smart TV is the newly launched model in 2023 by Samsung, currently available with prices starting from 94 million VND.
On the other hand, LG 77C2PSA OLED 4K 77-inch Smart TV is a highly favored OLED TV introduced last year, priced at approximately 55 million VND at present.
Both these TV models belong to the 77-inch segment with high prices. However, there's a significant price gap between the two, approximately 20 million VND. So, which one would be the optimal and suitable choice for you? Let's explore detailed comparisons of these two product lines below.

Comparison of Samsung 77-inch QA77S90C and LG 77-inch 77C2PSA TV Designs
Both OLED TV models boast exceptional aesthetics, appearing highly sophisticated and luxurious, suitable for various interior design styles. They feature ultra-thin designs with virtually borderless screens, embodying a futuristic vibe. The 77-inch size is ideal for spacious settings like living rooms, offices, hallways, hotel lobbies, and more.
The fundamental difference between these two 77-inch TV models lies in their stand designs. While LG's TV has a solid metal L-shaped stand, Samsung's model features a hollowed L-shaped stand.

Comparison of Samsung 77-inch QA77S90C and LG 77-inch 77C2PSA TV Screens
Belonging to the premium segment, both Samsung and LG equip their products with the most advanced screen specifications. They both feature 4K resolution and a 120Hz screen refresh rate, delivering smooth, vivid, and lifelike images down to the finest detail.
When it comes to screen panel technology, we can see the difference between these two major Korean tech companies. Samsung's TV is equipped with a QD-OLED (Quantum Dot OLED) screen panel – hailed as a breakthrough in current screen technology. This panel combines QLED and OLED technologies to deliver the ultimate screen performance with top-notch brightness, color accuracy, outstanding contrast, and perfect black levels.
Meanwhile, LG's TV model utilizes the OLED evo panel technology. This is LG's latest OLED screen technology, promising a better viewing experience with improvements in brightness, detail, and sharpness compared to conventional OLED screens.
The difference lies in the screen technology of the two product lines. Samsung equips the QA77S90C TV with a host of technologies, including the Real Depth Enhancer for improved depth, Quantum HDR OLED for optimized contrast and brightness. Especially, Samsung supports smoother gaming experience thanks to Motion Xcelerator Pro technology, enhancing image compensation and reproducing high-speed motion scenes with sharpness and smoothness at a refresh rate of up to 144Hz.

The LG 77-inch 77C2PSA TV is also equipped with some basic screen technologies such as Dolby Vision IQ for automatic brightness adjustment, HDR Dynamic, FilmMaker Mode for authentic cinematic viewing, and Auto Low Latency Mode (ALLM) to reduce screen latency during gaming.

Overall, both screens are outstanding, but Samsung edges slightly ahead in terms of display technologies, providing users with a more enjoyable viewing experience.
Comparison of Sound between Samsung 77-inch QA77S90C and LG 77-inch 77C2PSA TVs
In terms of sound, both models are equipped with Dolby Atmos speaker systems with 40W output, sufficient for you to immerse yourself in movie scenes or music melodies.
Furthermore, Samsung also incorporates additional sound technologies such as OTS Lite for vivid 3D sound emulation, AVA technology for automatic volume adjustment according to the surrounding environment, and notably, the synchronized sound technology of TV speakers and Q-Symphony soundbar, delivering more powerful speaker output.
Not falling behind, LG also equips itself with prominent sound technologies such as AI Acoustic Tuning – sound optimization compatible with the user environment, AI Sound Pro – optimizing listening quality according to content genres, and noise filtering with Clear Voice Pro mode.

Comparison of Operating System and Features on Samsung 77-inch QA77S90C and LG 77-inch 77C2PSA TVs
The Samsung 77-inch QA77S90C OLED TV runs on Samsung's Tizen operating system, featuring a user-friendly and intuitive interface. It offers users a plethora of entertainment options through a rich app store and popular apps like Youtube, FPT Play, Netflix, MyTV, POPS Kids, all pre-installed on the TV.
Additionally, notable features on this Samsung TV include video calling via Google Duo (users need to purchase an additional camera), voice control via Google Assistant and Bixby (both integrated with Vietnamese language), SmartThings app for convenient connection and control of the TV and smart home devices on the phone, AirPlay 2 (iPhone), Screen Mirroring (Android), and Tap View for quick content casting from the phone to the TV, as well as Multi View multitasking feature for displaying multiple contents simultaneously.
On the other hand, the LG 77-inch 77C2PSA TV uses the webOS 22 operating system and also provides a diverse range of entertainment apps. Some standout features of this LG 4K TV include the Magic Remote for magical control, LG Voice Recognition, LG Voice Search allowing users to create voice commands for Vietnamese voice search. However, virtual assistants Alexa and Google Assistant do not yet support Vietnamese. The TV also features Multi View, AirPlay 2, and Screen Share.
Conclusion
Thus, despite being more expensive, the Smart TV Samsung OLED 4K 77 inch QA77S90C demonstrates superiority in terms of image technology and the conveniences it brings.
However, the LG 77-inch 4K 77C2PSA OLED Smart TV, despite its lower price, still offers top-notch technologies available in today's market.
Your choice depends on whether you prefer a premium next-generation OLED TV or a budget-friendly option while still experiencing quality display technology. You may weigh between these two OLED TVs based on your needs.